Twin lamp-socket.



No. 852,490. PATENTED MAY '7, 1907.

R. B. BENJAMIN. TWIN LAMP SOGKET.

APPLICATION FILED FEB. 29, 1904.

2 SHEETS-SHEET 1.

PATENTED MAY '7, 190?.

R. B. BENJAMIN TWIN LAMP SOCKET.

APPLICATION FILED FEB. 29, 1904.

2 SHEETS SHEE I.

'10 of this specification.

.15 in an end toend position.

. REUBEN B. snnJa /nnoronroaeo, iL iNois. rwin nrnP-socasr.

no. see rec.

Specification of Letters Patent,

Eatented May *1, 190?.

Application filed February 29, 190%. Serial No. 195,830.

To a-ZZ 11/71 0777 it "may concern: Be it known that I, RETJBEN B.BENJA-= MIN, a citizen of the United'States, residing at Chicago, in thecounty of Cook and State of Illinois, have invented new and usefulImprovements in Twin Lamp-Sockets, of which the following is a full,clear, concise, and exact description, reference'being had to theaccompanying drawings, forming a part My invention relates to clustersocliiets'ior electric lamps, and has for its object the production of asocket of'minimum transverse -'seotion that will support two electriclamps t, is desirable to mount electric lamps inthis manner for use i indisplay work-in show cases and windows andin cornice and other similarwork. I In an application for United States Letters Patent filed January31st, 1903, Serial No.

141,262, .1 have described'a'species of my in.-

vention and have inserted generic claims therein; The presentapplication is foran other species or my invention, but it will be 2understood'the present application is sub sidiary to the genericapphcation' above referred to. I

The other features of 'my invention Wlll more fully appear from theaccompanying 3o drawings in. which like reference characters indicatelike parts throughout the several figures, and inwhich:

Figure 1 is a sectional elevation of my improved lamp socket; Fig. 2 isa sectional 3 5 view on the. line 2 2 of Fig. 1; Fig. 3 is a sectionalview on the line 3-3 of Fig. 1; Fig. 4c is a sectional view of the baseand shells with the casing and insulation. removed; Fig. 5 is a view onthe line5--5 of Fig. 1; Fig. 6 is a sectional view on the line 6 of Fig.1 Fig. 7 is a bottom view of another form of my invention adapted toreceive Ediswan lamp bases; Fig. 8 is a top view of the same; Fig. 9 isa sectional-eleva- 5 tion thereof showing the casing removed;

Fig. 10 is a sectional view of the insulating base on the line'1010 ofFig. 9; Fig. 11 is aview on the line 11-'11 of Fig. 12; Fig. 12 is aView on the line 1212 of Fig. 8; Fig. 13 is s a View on the line 13-13of Fig. 12; Fig. 14 IS an end view of a lamp base; and, Fig. 15 1S adetailed view of the method of locking the easings together.

' el' ramp; to Figs. 1 to 6, inclusive. by ref 5 5 en'ce eluiiracters,the base 1 is made of-insu- 1g materialpreterably1n one piece and of 1ed upon opposite sides thereof, lam receiving shells, 2, 2, which may besecure thereto in any suitable manner, as by bolts 3, 3, whichmechanically secure'the shells in position and electrically connect themonewith the other. A U-shaped plate 4, engages the threaded. ends ofsaid bolts and has an extended portion 9, which carries the bindin posts5', for connecting the outer contacts 0 "the lamps in circuit. Astrip 6,'carrying the binding posts 7, and having the ends thereof hent inwardlyand arranged opposite the cnter of the base is preferably securedthereto by -a. bolt or screw "8, which passes through the base andengages a tongue or strip 34,

struckhu'pirom one end of the strip 6, the

en s of said strip standing a short distance from" .tlie face of thebase 1, tofo'rm' center spring contacts for the lamps. f I

An opening is provided in one end of the strip 6, to atl'ordaccess tothe screw 8. A

portion of the shells '2, 2, is cut away as shown 111 Fig. 1, to permitthe strip 6 topa'ss' through the same. The extended portion 9,'carry1ngthe binding screw 5, and the strip 65, carrying the binding screw 7, arepreferably disposed in recesses 10,' 10,'formed in the base 1, in orderto permit the feed wires to be more readily attached thereto.

A metal casing or inclosing sheath 11,pref

erably made in two parts to afford access to the binding pos ts, isprovided for" the base 1' .14 and adapted to telescope therewith, as

shown in Figs. -1 and 6; A depression 15is iormedin the part 13 of saidcasirw, preferably .having the inner edge thereoi sheared and bentoutward, which co acts with the sheared edge 16 formed in the part 14.From the sheared edge 16 an outwardly extending depression 1"? istermed, having a depressed channel 1 leading thereto, which depressionl15'is adapted to enter said channel as the casing'lli is piaced inposition, the inner sheared edge ol the depression 15, co-acting withthe sheared edge 16 of the depresslon 17, to retain the parts 13 and 14of the casing 11 firmly in position on the base 1. A portion I 190i thepart 14 of the casing is cut away, as

gether as above described. The depressed .channel orroove 18 preferablyformed with a slightly contracted portion 20, adapt-.

shownin Fig. 5', to permit said part to be.

turned slightly to lock the parts thereof toed to retain the depressionin the depression 17, the casing 11 giving sufficiently to ermit thedepression 15 to be sprung into position therein.

,I am aware that other suitable means than those above described may beprovided for locking the parts of said casing in position,without-departing from the spirit of my invention. The base 1 hasashoulder or projection 22 formed thereon, engaged upon either sidethereof by the sheared and inwardly depressed edges 23, 23, of the part13 0f the casing 1.1, to hold thebase 1 in a fixed position therein; Iprefertoform openings 24, 24, in the casin 11 to afford access-to thebinding posts t3 and 7-when the part-14 of said casing is removed.

. lock said strips or rings of insulating material firmly together. Asimilar strip or ring 23 of insulating material is disposed between thepart 12 ot the casing and the other lamp re ceiving shell, the inneredge 20 of said strip or ring of insulating material beingpreferablyturned outward to abut against or engage the edge of the strip or ringof insulating material disposed between the base 1 and the casing11,when said casing is in position as shown in Fig. 6. The insulatingstrip or ring disposed between the base 1. and the casing 14 has acut-out portion 30 adapted to accommodate the shoulder or projection 22upon the base 1 'and also has a cut-out portion 31 opposite thestandard. or conduit 21 to permit feed wires to pass from the standard21 to the binding posts 5 and 7, a groove 32 being provided in the base1 For said wires. The base 1 is preferably'eut away on. one side of thegroove 32 to permit said base to be freely removed from the casing 1. 3without inury to the feed wires as shown in Figs. 1 and 4. To preventthe strips or'rings 25, 25, of insulating material disposed between theshells 2, 2, and the easmg 1.1 from rotating, I preferablylornidepressions 33, 33, in the casing 11 and corresponding depressions inthe insulatingstrips or rings 25, 25 .whirrh vii-act to hold axialstrips or rplgs in a fixed position within said casing.

Jn order to attain the object before mentioned of producing a clustersocket of mini- .muin transverse section, the casing 11 ispositionedc'onti uous with the insulating strips 25 immediate ysurrounding the lamp shells.

Referring now to Figs. 7 to 15, inclusive,

in which is illustrated a form of my inven-- tion adapted for usewithEdiswanlamps, an insulating base 34 made of porcelain or othersuitable insulating material has two trans verse apertures .formedtherein, lined with thin metal sleeves 35, 35, having outwardlyextending flanges 36 adapted to engage the contact plates 37.; Pins orbolts 38, 38, passing through the base 34 engage'the plates 37 and 39,apair of said plates being disposed upon each side of the base 34, toretain said plates in position thereon. The plates retainin positionwithinthe sleeves 35, contact pins 40 40, having shoulders and beingheld in contact therewith against the power of small coiled springs 41,41. A slight raised portion 58 is preferably formed upon either side ofthe basev 34 to insulate the contact plates from each other. The contactplates 37, 37, have extended portions carrying binding screws 42, 42 forattaching thereto the leading-in wires which pass .through conduit orsupport 43, if desired. A transverse groove 44 is formed in the bottomof the base 34 to permit the feed wires to readily pass to the bindingscrews 42, 42, said groove also permitting said base to be readilyremoved from the inclosing casing to be hereafter described, withoutdetaching the leading-in wires, therefrom. An inclosingcasinjg or shell47 preferably formed in two parts, is adapted to lit over the base 34,the contract ed ends 48 of said casing being adapted to receive the lampbases49, 49,.

The contact plates make electrical contact with the pins 4(1- whirh alsoaid in securing the lamps in posi- 50 of the lamp bases.

lion, springs 41 being arranged behind said.

pins which tend to move the sameto their outermost position, whereby theprojections 51 carried on the lamp bases are securely held in thecut-out portions 52.

Formed upon one member 47 of the in (losing casing or shell is astandard or sup-' port 43, which is preferablv hollowto adapt it toserve as a conduit "tor the leading-in wires, and provided with asuitable base 57. Formed in opposite sides 'of' the casing 47arcsnii'till pmiections 53, 53, adapted to enter longitudinaldepressions 54, 54, formed in the other piembcr 58 of said casing, whensaid members telescope each other, and lock therein when the casingcarrying the longitudinal depression is turned slightly to the right' Alongitudinalopening' 55 is cut in the top of the 'casing58, to receive asetscrew 46 carried in the top of the casing 47 and adapted to bescrewed home v to.lock said casing in position after the members thereofhave been snapped together as above de scribed, the set screw 46entering an aperture or cut-out portion in the base 34 to retain thebase in position. A- portion of the casing 58 is cut away at 56, toreceive the conduit or support 43, and is of such form as sition in thesockets. 1

While I have described my improved lamp socket with particular referenceto details of construction, I do not wish to be understood as limitingmyself. to said details, as many changes may be made therein, withoutde-.

parting from the spirit of my invention, and

I claim the right .to make all such changes as fairly fall within thescope ofmy invention.

Having described my invention what I claim as new and desire to secureby Letters Patent is: y

1. In a two-light lamp cluster, the combi* nation with a two-partiriclosing sheath, of.

an insulating base withinsaid sheath; lamp receiving shells associatedtherewith and dis-,

posed wi thin the opposite ends of said sheath and arranged to supportthe lam s in axial alinement, said inclosing sheath ying close to thereceiving shells and having unobstructed openings in the-ends thereof topermit the insertion of lamps in said shells,-

2. In a two-light lamp cluster, the combination with an inclosing sheathformed from two separable interlocking members, of lamp receiving shellsd sposed within the opposite ends of said sheath and arranged to'supportthe lamps. in axial alinement.

3. Ina two-light lamp cluster, the 'combi nation with a two-partinclosing sheath, of a support therefor secured to one of said partsland constituting a conduit for the leading-in wires, and lam shellsdisposed within the opposite ends 0 said sheath and. arranged to supportthe lampsin axial alinement.

4. In a two-light electric-lamp cluster, the combination with aninclosing sheath formed of two'parts arranged to telescope upon oneanother, of lamp-shells disposed within the opposite endsof said sheathand arranged to support the lamps in axial ali-ii'ement.

5. In a two-light lamp cluster, the combination with a two partinclosing sheath, of an insulating base arranged therein, lampreceptacles supported by said base and disposed within the oppositeendsof said sheath and arranged. to support -the lamps in axial aline- Iment, said inclosing sheathlying close to the lamp receptacles andhaving unobstructed openings in the ends-thereofto' permit the insertionofv lamps aipairi of binding posts common to said lamp receptacles andcarried by said base. 1

6. In a two-light electric lamp cluster, the combination with a two-partseparable in closing sheath of an insulatingbase arranged therein, lampreceptacles mounted upon sald base and disposed within the opposite endsof said sheath. and arranged to support the lamps inaxial alinement, apair of binding posts carried by said base and common to saidlampreceptacles, and a transverse standaid onsupport for said socketconstituting a z 7. In a two-light e ectri combination with an inelosingsheath formed of two sections, having a bayonet joint, of lamp receivingshells disposed within the o posite ends. of said sheath andfarranged 0support the lamps in axial alinement.

' 8. In a two-light electric lamp cluster, the combination with a twopart inclosing conduit for. the supply wires.

clamp cluster, the

sheath, of an insulating lining for said sheath, I

and lamp receptacles disposed within the opposite 'ends of said casingand arranged to support the lamps in axial alinement.

9. A two light electric lampcluster comprising a central portion adaptedto support two lamps in an end to end position, an inclo'sing casing orshell composed of two members,

.one' of said members having an aperture to the interior of the clusterwhen the other of said members is removed.

' formed therein, said aperture affording access 10. ,A two lightelectric lamp cluster comprising a central portion'adapted to supporttwo lamps in an end to end position, an inclosing casing or shellcomposed of two members, and an insulating lining for said casingcomposed of two members, the contiguous edges of said members havinginwardly and outwardly extending flanges formed therein, said flangesinterlocking to form a unitaryin sulated member. 1 1. In a two lightelectric lamp cluster, the combination with an insulating base, of lampreceptacles carried by said base and adapted to support the lampssubstantially in axial alinement, a pair of binding posts common to saidlamp receptacles, and a removable casing for said socket com osed of twomembers, one of said members aving an aperture or apertures formedtherein, said; aperture or apertures being closed when the other of saidmembers is in position and affording access to the interior of thesocket whenjsaid last mentioned member is removed;

12. In a two light electric lamp cluster, the combinatipn with aninsulating base, of lamp receptacles carried by said base and adapted tosupport the lamps substantially in axial almement, a pair of bindingpostscommon to said. lamp receptacles, and a casing for, said socket,said casing having? a depression 13. In a two light electric lampcluster, the combination with an insulating base, of lamp receptaclescarried by said base and adapted to support the lamps substantially inaxial alinem'ent, a pair of binding posts common to said lampreceptacles, a removable casing for sald socket composed of two members,one of said members having a depression formed therein adapted to engagea rejection carried by said base to retain sai base in a hxed positiontherein.

14. In a two light electric lamp cluster, the,

said lamp receptacles disposed in one of said members, and a pair ofrings or stripsof insulating material for said base and the other ofsaid receptacles disposed in the other of said members, the contiguousends of said pair of rings or strips of insulating, material havingoutwardly and inwardly extending flanges formed thereon, said flangesoverlapping and c0-acting to retain said pair of insulating rings orstrips of material together, said first mentioned ring or strip ofinsulating material co-operating with said pair oi" strips or rings ofinsulating material to form a e0ntin. nous insulating lining forsaidsocket.

In Witness whereof, I have hereunto subscribed my name in thepresence oftwo wit- REUBEN B. BENJAMIN.

Witnesses:

M. R. Roonronn, E. A. OLSEN.

